Zapier Webhook API

Overview

The ReplySequence Zapier webhook accepts meeting transcripts from any Zapier-connected source (Voicenotes, Fireflies, Fathom, Otter, Granola, Read.ai, tl;dv, Chorus, Avoma, Grain, Gong, or any custom Webhooks by Zapier trigger) and generates a follow-up email draft inside the authenticated user's ReplySequence dashboard.

This document covers the single endpoint used by the ReplySequence Zapier app. It is intended for Zapier partner reviewers and integration developers.

Endpoint

POST https://www.replysequence.com/api/webhooks/zapier

A verification endpoint is also available for Zapier's testAuth flow:

GET https://www.replysequence.com/api/webhooks/zapier/verify?userId=<uuid>

Authentication

Each request is authenticated with two pieces of information:

• User ID — the ReplySequence user UUID, sent inside the JSON body as the userId field.
• HMAC Signature — an HMAC-SHA256 of the raw request body, signed with the user's webhook secret and sent in the X-RS-Signature header in the format sha256=<hex>.

Users find both values in Settings → Integrations → Show webhook details on any platform card inside their ReplySequence dashboard. The secret can be revealed and rotated from that same panel.

Request schema

Body must be valid JSON.

{
  "userId": "a1b2c3d4-e5f6-7890-abcd-ef1234567890",
  "transcript": "Speaker A: Thanks for the call today...",
  "title": "Acme Corp — Pricing Review",
  "date": "2026-04-15T18:00:00.000Z",
  "duration": 1800,
  "participants": [
    { "name": "Alice", "email": "alice@acme.com" },
    { "name": "Bob", "email": "bob@example.com" }
  ],
  "source": "voicenotes",
  "externalId": "voicenote_abc123"
}

Response

On success the endpoint returns 200 OK with:

{
  "success": true,
  "meetingId": "<uuid of the ingested meeting>",
  "draftId": "<uuid of the generated follow-up draft>"
}

Errors

Rate limits

The endpoint accepts up to 60 requests per minute per user. Bursts above that return 429 with a Retry-After header.

Support

Questions, access requests, or integration issues: jimmy@replysequence.com.